/* ========================================
   Curtain Fabric Calculator Styles
   ======================================== */

.fcwp{
    --color-primary: #5a7a8a;
    --color-primary-dark: #4a6573;
    --color-primary-light: #7a9aaa;
    --color-accent: #c9a96e;
    --color-accent-hover: #b8985d;
    --color-bg: #f5f3f0;
    --color-surface: #ffffff;
    --color-surface-alt: #f8f7f5;
    --color-text: #2d3748;
    --color-text-light: #718096;
    --color-text-muted: #a0aec0;
    --color-border: #e2e8f0;
    --color-border-light: #edf2f7;
    --color-success: #48bb78;
    --color-warning: #ed8936;
    --color-danger: #e53e3e;
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: all 0.2s ease;
}

.fcwp {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.fcwp html{
    scroll-behavior: smooth;
}

.fcwp body{
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

.fcwp .container{
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Header
   ======================================== */
.fcwp .site-header{
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.fcwp .header-content{
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.fcwp .logo{
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Playfair Display', serif;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-primary-dark);
}

.fcwp .logo svg{
    color: var(--color-accent);
}

.fcwp .main-nav{
    display: flex;
    gap: 32px;
}

.fcwp .main-nav a{
    text-decoration: none;
    color: var(--color-text-light);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
}

.main-nav a:hover,
.fcwp .main-nav a.active{
    color: var(--color-primary-dark);
}

.fcwp .main-nav a.active::after{
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
}

/* ========================================
   Hero
   ======================================== */
.fcwp .hero{
    background: var(--color-primary);
    color: white;
    padding: 60px 24px;
    text-align: center;
}

.fcwp .hero-content{
    max-width: 700px;
    margin: 0 auto;
}

.fcwp .hero h1{
    font-family: 'Playfair Display', serif;
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.fcwp .hero-subtitle{
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.7;
}

/* ========================================
   Calculator Section
   ======================================== */
.fcwp .calculator-section{
    padding: 48px 0;
}

.fcwp .calculator-layout{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

@media (max-width: 900px) {
.fcwp .calculator-layout{
        grid-template-columns: 1fr;
    }
}

/* Input Panel */
.input-panel,
.fcwp .results-panel{
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.fcwp .panel-header{
    background: var(--color-surface-alt);
    padding: 24px 28px;
    border-bottom: 1px solid var(--color-border);
}

.fcwp .panel-header h2{
    font-family: 'Playfair Display', serif;
    font-size: 1.4rem;
    color: var(--color-primary-dark);
    margin-bottom: 4px;
}

.fcwp .panel-desc{
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.fcwp form{
    padding: 28px;
}

.fcwp .form-section{
    margin-bottom: 32px;
}

.fcwp .form-section:last-of-type{
    margin-bottom: 24px;
}

.fcwp .section-title{
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-border-light);
}

.fcwp .form-row{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.fcwp .form-row:last-child{
    margin-bottom: 0;
}

@media (max-width: 600px) {
.fcwp .form-row{
        grid-template-columns: 1fr;
    }
}

.fcwp .form-group{
    display: flex;
    flex-direction: column;
}

.fcwp .form-group label{
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 6px;
}

.fcwp .unit{
    color: var(--color-text-muted);
    font-weight: 400;
}

input[type="number"],
.fcwp select{
    padding: 10px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-surface);
    transition: var(--transition);
    font-family: inherit;
}

input[type="number"]:focus,
.fcwp select:focus{
    outline: none;
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(90,122,138,0.1);
}

.fcwp .help-text{
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* Radio & Checkbox */
.fcwp .radio-row{
    align-items: end;
}

.fcwp .radio-group{
    display: flex;
    gap: 20px;
    padding: 8px 0;
}

.radio-label,
.fcwp .checkbox-label{
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.9rem;
}

.radio-label input,
.fcwp .checkbox-label input{
    display: none;
}

.fcwp .radio-custom{
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-radius: 50%;
    position: relative;
    transition: var(--transition);
    flex-shrink: 0;
}

.fcwp .radio-custom::after{
    content: '';
    width: 10px;
    height: 10px;
    background: var(--color-primary);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    transition: transform 0.2s ease;
}

.fcwp .radio-label input:checked + .radio-custom{
    border-color: var(--color-primary);
}

.fcwp .radio-label input:checked + .radio-custom::after{
    transform: translate(-50%, -50%) scale(1);
}

.fcwp .checkbox-custom{
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    position: relative;
    transition: var(--transition);
    flex-shrink: 0;
}

.fcwp .checkbox-custom::after{
    content: '';
    width: 5px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg) scale(0);
    transition: transform 0.2s ease;
}

.fcwp .checkbox-label input:checked + .checkbox-custom{
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.fcwp .checkbox-label input:checked + .checkbox-custom::after{
    transform: translate(-50%, -50%) rotate(45deg) scale(1);
}

.fcwp .checkbox-group{
    padding: 4px 0;
}

/* Calculate Button */
.fcwp .calculate-btn{
    width: 100%;
    padding: 16px 24px;
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.fcwp .calculate-btn:hover{
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.fcwp .calculate-btn:active{
    transform: translateY(0);
}

/* ========================================
   Results Panel
   ======================================== */
.fcwp .results-panel{
    align-self: start;
}

.fcwp .results-content{
    padding: 28px;
}

.fcwp .empty-state{
    text-align: center;
    padding: 48px 20px;
    color: var(--color-text-muted);
}

.fcwp .empty-state svg{
    margin-bottom: 16px;
}

.fcwp .empty-state p{
    font-size: 0.95rem;
}

/* Result Cards */
.fcwp .result-cards{
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.fcwp .result-card{
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 20px;
}

.fcwp .result-card.primary{
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary-dark);
}

.result-card.primary .result-label,
.fcwp .result-card.primary .result-note{
    color: rgba(255,255,255,0.85);
}

.fcwp .result-label{
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-bottom: 4px;
}

.fcwp .result-value{
    font-family: 'Playfair Display', serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
}

.fcwp .result-card.primary .result-value{
    color: white;
}

.fcwp .result-note{
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* Results Grid */
.fcwp .results-grid{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

@media (max-width: 600px) {
.fcwp .results-grid{
        grid-template-columns: 1fr;
    }
}

.fcwp .result-card.half{
    padding: 16px;
}

.fcwp .result-card.half .result-value{
    font-size: 1.4rem;
}

/* Detail Section */
.fcwp .detail-section{
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.fcwp .detail-title{
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 16px;
}

.fcwp .detail-list{
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.fcwp .detail-item{
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.fcwp .detail-item .label{
    color: var(--color-text-light);
}

.fcwp .detail-item .value{
    font-weight: 600;
    color: var(--color-text);
}

/* ========================================
   Guide Section
   ======================================== */
.fcwp .guide-section{
    padding: 64px 0;
    background: var(--color-surface);
}

.fcwp .section-heading{
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    text-align: center;
    margin-bottom: 12px;
    color: var(--color-primary-dark);
}

.fcwp .section-intro{
    text-align: center;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto 48px;
}

.fcwp .guide-grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

@media (max-width: 900px) {
.fcwp .guide-grid{
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
.fcwp .guide-grid{
        grid-template-columns: 1fr;
    }
}

.fcwp .guide-card{
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
    position: relative;
}

.fcwp .guide-card.full-width{
    grid-column: 1 / -1;
}

.fcwp .guide-number{
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 12px;
}

.fcwp .guide-card h3{
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--color-primary-dark);
}

.guide-card p,
.fcwp .guide-card li{
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

.fcwp .guide-card ul{
    margin: 10px 0;
    padding-left: 20px;
}

.fcwp .guide-card li{
    margin-bottom: 6px;
}

.fcwp .pro-tip{
    background: rgba(201,169,110,0.1);
    border-left: 3px solid var(--color-accent);
    padding: 12px 16px;
    margin-top: 16px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 0.85rem;
    color: var(--color-text);
}

.fcwp .pro-tip strong{
    color: var(--color-accent-hover);
}

/* Table */
.fcwp .table-wrapper{
    overflow-x: auto;
    margin: 16px 0;
}

.fcwp .guide-table{
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.fcwp .guide-table th{
    background: var(--color-primary);
    color: white;
    text-align: left;
    padding: 10px 12px;
    font-weight: 600;
}

.fcwp .guide-table th:first-child{
    border-radius: var(--radius-sm) 0 0 0;
}

.fcwp .guide-table th:last-child{
    border-radius: 0 var(--radius-sm) 0 0;
}

.fcwp .guide-table td{
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-light);
}

.fcwp .guide-table tr:nth-child(even){
    background: rgba(90,122,138,0.03);
}

/* Results Explanation */
.fcwp .results-explanation{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 16px;
}

@media (max-width: 900px) {
.fcwp .results-explanation{
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
.fcwp .results-explanation{
        grid-template-columns: 1fr;
    }
}

.fcwp .result-item h4{
    font-size: 0.9rem;
    color: var(--color-primary-dark);
    margin-bottom: 6px;
}

.fcwp .result-item p{
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ========================================
   Assumptions Section
   ======================================== */
.fcwp .assumptions-section{
    padding: 64px 0;
    background: var(--color-surface-alt);
}

.fcwp .assumptions-grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 900px) {
.fcwp .assumptions-grid{
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
.fcwp .assumptions-grid{
        grid-template-columns: 1fr;
    }
}

.fcwp .assumption-card{
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.fcwp .assumption-icon{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.fcwp .assumption-card h4{
    font-size: 0.95rem;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}

.fcwp .assumption-card p{
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.fcwp .assumption-card a{
    color: var(--color-primary);
    text-decoration: underline;
}

/* Disclaimer */
.fcwp .disclaimer{
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: rgba(237,137,54,0.08);
    border: 1px solid rgba(237,137,54,0.2);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    margin-top: 32px;
}

.fcwp .disclaimer svg{
    flex-shrink: 0;
    color: var(--color-warning);
}

.fcwp .disclaimer p{
    font-size: 0.9rem;
    color: var(--color-text);
}

/* ========================================
   FAQ Section
   ======================================== */
.fcwp .faq-section{
    padding: 64px 0;
    background: var(--color-surface);
}

.fcwp .faq-list{
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.fcwp .faq-item{
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.fcwp .faq-question{
    width: 100%;
    text-align: left;
    padding: 18px 24px;
    background: var(--color-surface);
    border: none;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    font-family: inherit;
}

.fcwp .faq-question::after{
    content: '+';
    font-size: 1.2rem;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-left: 12px;
}

.fcwp .faq-item.active .faq-question::after{
    content: '−';
}

.fcwp .faq-question:hover{
    background: var(--color-surface-alt);
}

.fcwp .faq-answer{
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.fcwp .faq-item.active .faq-answer{
    max-height: 300px;
}

.fcwp .faq-answer p{
    padding: 0 24px 18px;
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ========================================
   Footer
   ======================================== */
.fcwp .site-footer{
    background: var(--color-primary-dark);
    color: rgba(255,255,255,0.7);
    padding: 32px 0;
    text-align: center;
}

.fcwp .site-footer p{
    font-size: 0.85rem;
}

/* ========================================
   Animation
   ======================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fcwp .result-card{
    animation: fadeIn 0.4s ease forwards;
}

.fcwp .result-card:nth-child(1) { animation-delay: 0.05s; }
.fcwp .result-card:nth-child(2) { animation-delay: 0.1s; }
.fcwp .result-card:nth-child(3) { animation-delay: 0.15s; }
.fcwp .result-card:nth-child(4) { animation-delay: 0.2s; }
.fcwp .result-card:nth-child(5) { animation-delay: 0.25s; }